To which govt' agency do I write to formally complain about incaccurate statements made by a credit card co.?

Question

I was a promised a certain APR rate on purchases for a specific period of time. When the time came for that lower APR to begin, my statement still showed the former higher APR.

When I inquired, I was told that the information I had been given was wrong, even though I received it from company reps and made purchases based on the information I received. I have never made late payments. I have never missed a payment. I have never had an access check returned. I have never been overlimit.

The reason I was given for the lower rate not being put into effect was because the reps I had spoken with (there was more than one and I have all of their names and badge numbers and the dates I spoke with them) just gave me bad information, and the credit card company won't back up the statements made by their employees.

Answer 1

It would be the Federal Trade Commission but without written proof of the offer you don't have a leg to stand on.

Answer 2

Better Business Bureau is where you file complaints. However, unless you are a big fish, no one will take you seriously.  

Answer 3

Unless you have written proof of the offer, your complaint will go nowhere.